Guess who must be furious over the $19B Facebook-WhatsApp deal?

WhatsApp? Don't ask!!: While Facebook’s $19 billion deal to acquire WhatsApp has surely sent cofounders Jan Koum and Brian Acton and their team over the moon, quite a few business people inside and outside the startup sphere must be furious over the news. Click through for a look at who and why.

Bloomberg; Winklevoss Twins (Business First)and Google (handout)

Evan Spiegel: If the Snapchat CEO and cofounder was somehow just playing hard to get when his company rejected Facebook’s $3 billion acquisition offer in 2013, he must be furious that WhatsApp was worth more than six times as much to Facebook. Plus, WhatsApp’s other cofounder, Brian Acton, had some harsh words about SnapChat and Spiegel in an interview with Wired, saying Snapchat is basically for teenagers hoping for sex. “Clearly [Snapchat cofounder] Evan Spiegel only has his pulse on one part of the world. We have a whole wall of stories about people who got to know each other long distance and eventually got married. You’re not going to do this over Snapchat. And people want chat histories. They’re a permanent testimony of a relationship,” Acton told Wired.

Steve Jennings/Bloomberg

Google's Larry Page and Sergey Brin: Was Google a spurned suitor for WhatsApp? Two separate sources told Fortune writer Jessi Hempel that the company that Page and Brin built offered to buy WhatsApp for $10 million, just about half the price of what Facebook agreed to. Unlike the Facebook agreement, the Google bid apparently did not come with promise of a board seat. WhatsApp CEO Jan Koum will join Facebook’s board of directors as part of the acquisition deal.

Google

Telco companies: Guess who loses when a messaging startup that lets users send messages, plus photos, video, and audio, gets picked up by Facebook? Telecom companies, which would much prefer to be collecting fees for texts and which have lost an estimated $23 billion to social messaging apps in 2012. Perhaps the biggest loser is the biggest telecom player of them all: Dallas-based AT&T which tops a recent list of the world’s 10 most valuable telecom brands, with a brand value estimated at $75.5 billion.The chairman and chief executive officer of AT&T Randall Stephenson, shown here during a session at the World Economic Forum (WEF) in Davos, Switzerland is definitely not having a good day now that a service that was mostly used outside the United States has partnered with Facebook.

Chris Ratcliffe/Bloomberg

Kleiner Perkins Caufield & Byers: Sequoi Capital was the sole venture investor in Whats App and stands to make about $3.5 billion on its investment in the mobile messaging service. according to Bloomberg. Sequoia reportedly paid merely $8 million for a stake of more than 15 percent in 2011. So we’re guessing there must be gloomy faces in other Silicon Valley VC firms that either didn’t know or didn’t care about WhatsApp, particularly at the offices of Kleiner Perkins Caufield & Byers in Menlo Park, California, which is Sequoia’s prime crosstown rival where John Doerr (pictured) is one of the senior partners.

David Paul Morris/Bloomberg

Kevin Systrom: The Instagram co-founder, who sold his company to Facebook for a now-paltry-looking $1 billion, must be wondering whether he should have held out for more money and—,given the lukewarm reception Instagram’s one-to-one messaging got, bemoaning the days where he was the company’s hot young face versus the company man. Oh, and he didn't get a seat on the Facebook board like new darling Jan Koum is getting.

David Paul Morris/Bloomberg

Winklevoss twins: Once again, Mark Zuckerberg stuck it to Cameron and Tyler Winklevoss. The huge WhatsApp-Facebook deal stole thunder from the twins, who on the very same day the deal was announced submitted SEC paperwork for the Winklevoss Index, aka Winkdex, their new Bitcoin exchange. The twins famously sued Facebook, claiming Zuckerberg stole their idea and actually won a $65 million settlement back in 2008—an amount that must seem smaller than ever now.